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English definition of “upstairs”

upstairs

adverb [before noun], adjective     /ʌpˈsteəz/ US  /-ˈsterz/
A2 towards or on the highest floor or floors of a building: an upstairs landing/window He heard glass breaking and ran upstairs to see what had caused it. → Opposite downstairsFloors and parts of floors upstairs     noun [S] Sadly, the upstairs of the house was gutted by fire.Floors and parts of floors
(Definition of upstairs adverbadjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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